Home › Words › S › sestercentenarysestercentenarysestercentenary means of or relating to a 250th anniversary, or to a span of 250 years.EtymologyBy haplology of *sestercecentenary, a blend of sesterce (a two and a half coin) + centenary, or from Latin sēster(tius) + centenary.adjOf or relating to a 250th anniversary, or to a span of 250 years.e.g.“1982 saw the sestercentenary commemoration of George Washington’s birth.”nounA 250th anniversary.e.g.“The city of New York celebrated its sestercentenary in 1903.”Definitions & examples from Wiktionary (CC BY-SA 3.0).